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- (No Model.)

J. H.. NORTHRP-l BOLSTBR FOR SPINNING SPINDLES.

No. 503,911. Patented Auggzz, 189s.

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IlIlIlI' PATENT OFFICE.

JAMES H. NORTHROP, OF IIOPEDALE, MASSAOHUSETTS,.ASSIGNOR TO GEORGEDRAPER n SONS,

OF SAME PLACE.

BOLSTER FOR SPINNING-SPINDLES.

SPECIFICATION forming part of Letters Patent No. 503,911, dated August22, 1893.

Application filed April 22, 1893.

To a/ZZ whom it may concern:

Be it known that I, JAMES H. NORTHEOP, a subject of the Queen of GreatBritain, residing at Hopedale, county of Worcester, State ofMassachusetts, have invented an Improvement in Bolsters forSpinning-Spindles, of which the following description, in connectionwith the accompanying drawings, is a specification, like letters on thedrawings representing like parts.

Prior to this invention it has been customary to provide a bolster orlateral bearing for use in a surrounding bolster-case or support, withan elastic or yielding cushion or packing, and such packing has beenmade as a tube or jacket drawn over and fastened at its ends to thebolster tube by a string or thread.

In practice the string sometimes breaks thus loosening the tube, and inuse, if the string holds, the strain on the bolster, due to lateral andother movements in the bolstercase, and also in removing it from andreplacing it in the case, distorts, loosens, twists, and cuts throughthe tube or jacket, and the cushion becomes deteriorated andthe Work ofthe spindle is reduced to a point below the proper standard ofefficiency.

I have aimed to produce VVan indestructible cushion,a cushion which willnotwear through or become loose on the bolster, and which cannot bedisplaced longitudinally thereon.

In accordance with my invention I have provided the exterior of thebolster with a series of grooves, notches or indentations into which thecushion material enters and by which it is prevented from longitudinaldisplacement, the portions of the cushion outside said grooves, notchesor indentations contacting with the outside support for the bolster, andin wear the cushion can never be cut entirely through, for that part ofit originally entering the grooves, notches, ctc., will always remainthere suiciently to prevent contact of the metallic exterior of thebolster with the metallic interior ot' the surrounding outside support.

Figure 1, in section and elevation, shows a spindle-bearing and spindlecontaining my improvement. Fig. 2 shows the bolster removed and greatlyenlarged, with the cushion Serial No. 471,397. (No model.)

or covering thereon. Fig. 3 shows the bolster with the covering removed.Fig. 4. is a top or upper end view of the bolster shown in Fig. 3, andFig. 5, a lower end viewthereof.

The bolster-case A and the sleeve whirl spindle B are and may be ofusual construction. The bolster-case contains a metallic bolster, theinterior of which may be of any usual or well known shape, and the stepused to support the bolster may also be of any 6o usual or well knownshape and yet be within the scope of this invention. Ordinarily thebolster bearing has drawn over or upon it a knitted or braided tube, ora tube made by sewing together flannel or other soft mate- 5 5 rial, butin practice I have ascertained that such tubes are so loosened on thebolster, that they slip thereon longitudinally, or wear through. Toobviate this trouble I provide the exterior ofthe bolster a with aseries of 7o grooves, notches, or indentations a', preferably extendingaround the bolster in the form of a screw-thread, or it may be a seriesof annular notches. These notches maybe of any suitable shape common tothe shape of screw threads. Into these notches, for the best results andin the simplest form of my invention, I wind a yarn, as b, fastening theends b of the yarn to the ends of the bolster, preferably by drawing thesaid ends into a suit- 8o able hole in the ends of the bolster, andpreferably thehole b2, see Figs. 4. and 5, will have a slit b3 leadinginto it to enable the yarn or thread to be drawn in by a lateralmovement as commonly practiced in putting thread into 8 5 thread-eyes orguides of sewing and other machines.

The bolster having a covering, wherein a part of the covering iscontained in grooves or notches, and another part that projects out- 9owardly beyond the apices or crowning parts of the metal between thegrooves and notches, presents a surface which, it will be obvious,cannot become detached so as to slip longitudinally upon the bolster,and in case of external Wear, the wear cannot go through the covering,certainly not farther than the high portions of the metal between thenotches, as stated, and the portion of the covering contained within thenotches cannot, therefore, be cut through roo yIO but will always remainin place to furnish a more or lessyielding cushion:

The bolster may have, at suitable inter! vals, suitable oil holes as c.

This invention is not limited to the particular shape shown for thenotches to receive the packing material, nor tothe particularmat'e rialof the packing, my inventionl including any packing the interior ofwhich is embedded in notches and which projects outwardly beyond themetal surrounding the notches, to operate in the manner hereinspecified.

I find Woolen yarn to be the best material for the packing, but thisinvention is not limited to the particular materialof thepaok ing solong as it affords an elastic covering,`

and is capable of being applied and held in position,1 as described, andmay, inoperation, act as a perpetual covering to move 'only in unisonwith the bolster bearing.

A bolster cover, in accordance with my invention, will befound to have apractically indestructible cushion.

Having described my invention,'what I than filling, said grooves theends of the' strand being suitablyV connected to the bolster,substantially as described.

3. A bolster provided with a screw thread on' its exteriorgand having astrand of soft `materialwoundl on such screw thread, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JAMESv H. NRTHROP.

f Witnesses:

' E. LONcnrELLovv,

S. F. SMITH.

